SmogRank / World / Japan / Aichi / 2025

Most polluted cities in Aichi, Japan, 2025

23 cities in Aichi, Japan ranked by their average PM2.5 over the 365 days; 23 above the WHO annual guideline (5.0 µg/m³). Worst: Owariasahi at 11.4 µg/m³, #655 of 2,624 cities in the world. Cleanest: Shinshiro at 7.2. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Tahara 1% 1%0
Every city in Aichi, Japan ranked for 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Tahara
    1%
  2. 2Toyohashi
    1%
  3. 3Minamichita
    1%
  4. 4Owariasahi
    1%
  5. 5Nishio
    1%
  6. 6Ama
    1%
  7. 7Kariya
    1%
  8. 8Okazaki
    1%
  9. 9Nagoya
    1%
  10. 10Ichinomiya
    1%
  11. 11Gamagōri
    1%
  12. 12Shinshiro
    0%
  13. 13Tokoname
    0%
  14. 14Inuyama
    0%
  15. 15Hekinan
    0%
  16. 16Anjō
    0%
  17. 17Nisshin
    0%
  18. 18Seto
    0%
  19. 19Handa
    0%
  20. 20Chiryū
    0%
  21. 21Tōkai
    0%
  22. 22Toyota
    0%
  23. 23Kaminoma
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, 2025 · All cities in Japan, 2025 · Aichi now

Use this board

SmogRank, most polluted cities in Aichi, Japan, PM2.5, 2025, smogrank.com/jp/region/aichi/history/2025 (accessed 6 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.